#include "string.h"

using namespace bit;
using std::cout;
using std::endl;
using std::cin;

int main()
{
	/*string s1("123456");
	s1[size_t(2)];
	string s2(s1);
	cout << (s1 == s2) << endl;
	s2 += '9';*/
	/*cout << (s1 != s2) << endl;
	cout << (s1 < s2) << endl;

	cout << s1 << endl;
	s1.append("789");
	cout << s1 << endl;

	string s2("asdf");
	cout << s2 << endl;*/

	/*cout << s1 << endl;
	cout << s2 << endl;
	s1.swap(s2);
	cout << s1 << endl;
	cout << s2 << endl;*/

	/*string s3;
	s3 = s2;
	cout << s3 << endl;
	cout << s3.empty() << endl;
	string s4;
	cout << s4.empty() << endl;*/

	string s1("12");
	string s2("34");
	cin >> s1 >> s2;
	cout << s1 << s2 << endl;
	return 0;

}